Railway-spike.



P. P. KGBERT. RAILWAY SPIKE; APPLICATION LILED Nov. 23, 1010.

Patented July 25, 1911.

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which the spike is securely locked in the tie or other wood into which it is driven.

I have demonstrated by actual experiment that when a spike of this class is made in the manner shown and described and locked in a railway tie, or other piece of wood into which it is driven, it requires an exertion of from three to four times the amount of force to draw the spike as would be ordinarily necessary with spikes of this class as usually cbnstructcd, and the spike will remain in the wood until. the latter decays sufliciently to permit oi the easy withdrawal of the spike.

When the locking pin and spike are made in. the manner shown in Figs. 1 to '-l inclusive, a part of the head (Z oi the locking pin projects above the spike when said pin is driven inwardly through said spike as shown in Fig. 3, and a suitable tool or implement may be applied. to the head. of the locking pin, and said locking pin may be withdrawn from the spike if desired, after which the spike itself may be withdrawn by applying sufiicient force thereto, to press the parts (i together, as said spike is withdrawn from the wood.

In Fi 5, I have shown a modification in which the head a of the spike is provided on the top surface with knobs or projections, or

an annular bead a, and the locking pin a is provided with a flat head (Z which overlaps the knobs, projections or annular head of, and a suitable tool or instrument may be applied to said head to withdraw the lockin pin, when desired.

diaving fully described my invention,

what I claim as new and desire to secure by Letters Patent, is i A spike of the class described, one end portion of said spike being provided with a head, and the other end portion being wedgeshaped in form to produce a cutting edge as long as the transverse thickness of the spike, the body of the spike being also provided with a central longitudinal bore one end portion of which opens out through the head of the spike, and the other end portion which extends to within approximately one inch from the cutting edge end thereof and terminates in a conical recess, the er end of the spike being also split longitudinally and in a plane at right angles to said edge, and into and longitudinally of said here to a predetermined distance from conical recess greater than the distance from said recess to the edge of the spike, and a locking pin provided. with a pointed or tapered end and adapted to be driven into said boreand to force the side portions at the edge end of the spike outwardly so to lock said spike in the material intowhich it is driven, said pin being also provided at one end with head which projects from the head oi he I spike when said pin is driven into said here.

In testimony that I. claim the foregoing as my invention I l1-ve signed in name in presence of the subscribing witnesses this ltlth day of Noven'iber 1910-,

1 FRANK P, 

